To my knowledge, there just isn't any way to change them due to the 3 wire set up. Now, if you're lucky enough to have 5 or 7 wires (can't remember) run already, then you can change the control box (maybe) in the AC unit itself to the older style, and do the thermostat mod. And even then, I'm not 100% sure you can do that. Pull the t-stat and see if they ran a whole bundle and tucked the remaining wires away.
My solution? My next rig will have Colemans. I used to like Dometic, but ever since they went to this thermostat and new AC, I dislike them.
John and Rebecca Dickson
Emma-7 / Little John-5 / Iva-1
Full Timing Again, Rev B
2013 Ford F-350 Lariat CC LB PSD
2015 SOB TT - With OC's Awning Poles (#8)
At least in Heaven, RVs will be perfect, and I won't have to keep fixing them.